The open archive for STFC research publications

Full Record Details

Persistent URL http://purl.org/net/epubs/work/38121091
Record Status Checked
Record Id 38121091
Title CLARA Gun Temperature Control Using Omron PLC
Abstract STFC Daresbury Laboratory is currently commissioning Phase I of CLARA (Compact Linear Accelerator for Research and Applications), a novel FEL (Free Electron Laser) test facility focused on the generation of ultra-short photon pulses of coherent light with high levels of stability and synchronization. In order to maintain phase stability the CLARA gun requires a precision water temperature control system to maintain a gun cavity temperature within 0.028°C. This is achieved by mixing two water circuits with temperatures close to the desired set point. Two temperature measurement systems were evaluated for precision and reliability, the resultant system uses a single Omron PLC which provides all the precision read back and control loops. High resolution input modules and averaging achieve precision temperature monitoring while two PID loops control the coarse and fine temperature control. EPICS control is achieved using the FINS protocol communicating with a Linux IOC. This paper gives details of the system requirements and implementation and also describes initial results.
Organisation TECH , STFC
Funding Information
Related Research Object(s):
Licence Information:
Language English (EN)
Type Details URI(s) Local file(s) Year
Paper In Conference Proceedings In 16th International Conference on Accelerator and Large Experimental Control Systems (ICALEPCS2017), Barcelona, Spain, 8-13 Oct 2017, (2017): 1582-1586. doi:10.18429/JACo…CALEPCS2017-THPHA114 2017